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A simple, inexpensive dual vessel evaporating system has been developed to avoid contamination that may arise from the laboratory environment. A 200-fold preconcentration was achieved by the evaporation of 100 mL Milli-Q water on a water bath for 6 h and subsequent analysis was carried out by ion chromatography (IC). The detection limits achieved were 1, 2 and 11 ng L−1 for fluoride, chloride, and...
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